Dry Block Calibrator
150 to 1200°C
g
High Temperature Thermocouple Calibration Furnace
g
Custom Furnace Design with Optimised Profile
g
Calibrate Whole Measurement Loop
The Pegasus range offers extreme high temperature
calibration in an easy to use portable package - ideal for
the calibration of high temperature thermocouples. It has
been designed for fast heating and finds applications in the
glass, electrical power, automotive and material processing
industries.
A Blackbody target can be added for the calibration of
infrared thermometers.
The standard insert has four 8mm pockets 80mm deep.
The metal insert is strategically placed beneath 50mm of
insulation to provide optimal performance over the radiant
temperature range.
Pegasus
The optional Blackbody target is used with a specially
angled Type R thermocouple that sits immediately behind
the target area.
These award winning calibrators are easy to use and are
available in three versions – the Basic, the Site and the
ADVANCED. The Basic has a digital display of set and
nominal temperature, the Site additionally includes an inbuilt independent temperature indicator for a reference
probe. The ADVANCED controller has inputs for reference
and test thermometers with a further range of sophisticated
features including automatic temperature cycling, secure
data logging and full colour high resolution display.
The B model should be used with an external reference
probe and indicator, such as the milliK. The thermocouples
UKAS Calibration available for these systems - International Traceability - Best Practice
under test should be calibrated by comparison to the
external probe.
All models include I-Cal Easy LOG software and the
ADVANCED models additionally include software to
manage logged data and configure the unit, see page 14
for more details.
See page 14
BASICSITEADVANCED
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CALIBRATION SOLUTIONS
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Parameter Model
Pegasus 4853
Temperature Range 150°C to 1200°C
ADVANCED Range
Stability ±0.05°C @ 150°C ±0.08°C @ 1200°C
Display Resolution 0.01°C over whole range
Input Channel Accuracy: Thermocouple E,J,K,N: ±0.2°C @ 660°C R: ±0.6°C S: ±0.7°C @ 660°C T ±0.2°C @ 150°C
CJC Accuracy ±0.35°C
Input Channel Accuracy: RTD ±0.05°C ±0.005% RDG
BASIC / SITE Range
Stability ±0.1°C @ 150°C ±0.2°C @ 1200°C
Display Resolution 0.1°C from 150°C to 999.9°C then 1°C: 0.01°C Over PC Interface
COMMON Specifications
Blackbody Source ±0.3°C
Cools from 1200°C to 800°C
1200°C to 200°C
Heating Rate 25°C / minute
Best Performance See Graph
Calibration volume 33.5mm diameter by 130mm deep
Standard Insert 4 x 8mm Pockets all 80mm deep + 50mm top insulator
Indicator units °C, °F, K
Power 115Vac or 230Vac (50 / 60 Hz) 800 Watts
Dimensions 384H (including handle) x 212W x 312D mm
Weight 13kg
in 50 minutes*
in 180 minutes*
*substantially reduced by the cooling adaptor
ADVANCED SITE BASIC
Digital Display of Set and
Nominal Block Temperature
PC Interface Ethernet + USB Host Serial Serial
Test Thermostats Yes - Two Inputs Yes - Single Input No
Independent Temperature
Indicator for Reference Probe
Up to 3: Two universal
Additional Inputs for Units
Under Test
Automatic Temperature
Cycling
Data Logging Yes - Export to USB No No
Offset Elimination
Choose English, French,
Italian or Spanish Language
In Built Web Server Yes No No
Tamper Proof Data
Thermocouple or Process
inputs and a further
Thermocouple input
Yes - block can follow
Yes - on full colour display No No
Yes - Suitable for life
science, automotive and
aerospace applications
Yes Yes Yes
Yes Yes No
inputs for
reference input
PRT,
No No
Yes No No
No No
No No
CALIBRATION SOLUTIONS
33
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Pegasus Accessories
dry Blocks
HIGH TEMPERATURE
Metal Block Bath
The Pegasus includes an insert suitable for high temperature
calibration of thermocouples.
Blackbody Source
Add the Blackbody accessory to allow calibration of infrared
thermometers.
Metal Block Insert
Standard Insert Included
Four 8mm pockets. Pocket depth 80mm +
50mm insulator. Effective depth 130mm.
853-06-02 Blank Insert
Insert without pockets for local machining
853-06-02b Custom Insert
Contact Isotech with your requirements
Blackbody Kit 853-06-03
Includes a Blackbody target and Sensor
Calibration
Includes three point traceable calibration
certificate for block temperature
UKAS Calibration
Recommended: Options for block
temperature and reference thermometer
inputs (simulation). Legally traceable in
more than 70 countries.
Standard Probe 935-14-91
Type R Platinum Thermocouple for use up
to 1200°C.
Air Cooling 853-04-02
For use with a compressor this accessory
allows air to be blown into the block for
rapid cooling.
Ceramic Insulators 853-06-04
Current Loop Interface 935-06-161
Carrying Case 931-22-111
Spare insulation pack Includes 2 x standard
tops and 2 x standard bottoms.
24VDC Power Supply and Terminal Box.
Powers 4-20mA Current Transmitters with
4mm terminal posts for easy connection.
Sturdy case with room for accessories.
Features wheels and pull out handle.
1.2°C
1.0°C
0.8°C
0.6°C
0.4°C
0.2°C
0°C 200°C 400°C 600°C 800°C 1000°C 1200°C 1400°C
0°C
Pegasus
Audit Calibration (Similar Sensors)
S model with UKAS option
0.4
0.05
0.1
0.2
0.5
1.0
Radial Homogeneity
(difference between holes)
The world’s leading National Metrology Institutes
choose Isotech - shouldn’t you?
Pegasus Benefits
The Pegasus features a small tube
furnace to allow operation to 1200°C in
a portable case. With a ceramic
furnace construction temperature
gradients are larger than with lower
temperature metal blocks.
The Isotech furnace benefits by using a
specially wound furnace tube
assembly. They are manufactured in
our factory with the turns concentrated
at the ends of the furnace, where the
heat losses are greatest. This gives an
improved temperature profile and lower
uncertainty.
Insulators are provided for the top and
bottom of the furnace which further
improve temperature uniformity.
The effective immersion depth is
130mm, 80mm in the metal insert and
then a further 50mm in the furnace
tube.
Benefit from Isotech’s design and
experience
g Audit Calibration (Similar Sensors)
g Radial Homogeneity
See Evaluation Reports for full details
http://www.isotech.co.uk
How To Order
1 - Select Desired Options and Accessories
2 - Supply Voltage:
Specify either 115Vac 50/60hz or 230Vac 50/60Hz
CALIBRATION SOLUTIONS
35
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36
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CALIBRATION SOLUTIONS
An Introduction to
Fast Calibrators
This section focuses on the equipment needed for the rapid checking, testing
and calibration of instrumentation and temperature sensors.
Service engineers and those working on site will appreciate
the benefits of simple and fast temperature calibration. An
engineer forced to carry a calibrator up a ladder or into a
confined space will value the handheld QuickCal.
The Products Featured in this section have:
Outstanding Value
n
n Compact Size with true handheld models
n Wide Operating Ranges
n Fast Response
Quick-Cals
There are two Quick-Cal models, handheld, portable and
capable of operating from -12°C to 350°C
Fast-Cals
Fast-Cals work from -35°C to 650°C in three ranges, -35°C to
140°C, 30°C to 350°C and 35°C to 650°C.
During 2004, 20 experienced engineers from many parts of
the world specified their ideal products for Industrial
Calibration. Fast-Cal realizes their top ten requirements of:
One model is ideal for the Validation of Washer Disinfectors,
Steam Sterilisers and Autoclaves. In place of a removable
insert it has a fixed block with pockets for a reference probe
and the type of test sensor commonly used in validation
applications.
1 Rugged
2 Lightweight
3 Easy to use on site
4 Low cost/high benefit ratio,
5 Fast response, high stability
6 Time saving features
7 Multiple sensor testing
8 Software
9 Modern design
10 Compliant with latest regulations.
37
CALIBRATION SOLUTIONS
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n Immersion depth is very important
0mm5mm 10mm 15mm
Diameter
Stem Error
20mm 25mm 30mm 35mm
0.0001%
0.001%
0.01%
0.1%
1%
10%
100%
Immersion Depths for various diameter thermocouples or thermistors in a dry block bath
0.3%
50
120
300
300
300
300
400
400
400
160
160
160
160
160
70
90
110
100
140
180
220
150
210
270
330
200
280
360
440
250
350
450
550
http://www.isotech.co.uk
When selecting a Dry Block Calibrator depth of immersion is
very important. The chart below provides guidance in
selecting a bath for immersion depth. Note that sensors with
a long sensing length will require greater immersion. The
chart is general and applies equally to all dry blocks - not to
a particular model or manufacturer.
Example shows 0.3% stem error for a 15mm diameter thermocouple immersed 160mm in a dry block.
Note 1 For sensors immersed in stirred liquids the diameter of sensor can be doubled, or the minimum depth halved.
Note 2 The sensing length must be added to the above immersion depth calculation
N.B. The above gives a good guide, however each sensor will be slightly different.
For full information on immersion depth visit the technical library on the Isotech website.
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